Anna Faris has confessed that she lacks self-confidence about her sexuality.

The What's Your Number? star revealed at a recent New York City screening of the film that she has little in common with her alter ego, a woman who sleeps with many different men before finding Mister Right.

"I'm not a very good lover. I'm so nervous about my sexuality," Faris explained.

She went on to reveal that she had not experienced many relationships before meeting husband Chris Pratt.

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"I'm at five," she said, referring to her number of sexual partners. "Don't you think five is kind of low? I'm 34!"